Honestly? That specific pairing feels like it's always a footnote in the Sasuke-Ino-Sakura-Naruto web, which is a shame because there's a foundation there that's weirdly solid if someone actually bothers to dig into it. They're both loud, ambitious, and grew up with a ton of parental expectation, but Naruto's loneliness and Ino's social confidence could clash in such an interesting way. A lot of the fics tagged for them are just harem stories or background ships in a bigger plot, so finding ones where their relationship is the plot and they actually change as people is a grind.
I kept coming back to 'Blossom' by EtchedFire, which is unfortunately on a permanent hiatus but the chapters that exist do this thing I love: it starts post-Pain invasion, with Ino taking over the flower shop and Naruto, post-Jiraiya, just... visiting. The development is quiet. It's about her realizing his bravado is a performance and him seeing past her 'pretty girl' facade to the sharp mind running a business and grieving her sensei. They influence each other's goals. He makes her think about what she really wants for the village, not just her clan; she grounds him when the legacy of the Sage stuff gets too abstract. The character work felt earned, not just slapped on.
You have to wade through a lot of 'Naruto returns god-like and collects Ino' stuff to find these slower burns. Another one, 'Headspace' on AO3, tackles it from a mental health angle after the war, with Ino helping him sort through the mental fallout of Kurama and the bijuu, and her own development comes from dealing with the Yamanaka techniques' ethical limits. It's less about romance and more about two people helping each other rebuild their identities, which ends up being far more intimate.